RFE (libvirt-reproducer): add mechanism allowing user to keep/pass params to script

[Matt Young]

This RFE is a result of testing / iterating on the CI squad's 12th sprint:

https://trello.com/c/JEGLSVh6/51-reproduce-ci-jobs-with-libvirt

A common scenario when using the libvirt reproducer script / roles is the need to have common parameters including:

- volume path
- DNS settings
- pool name
- keys that should be injected
- new parameters under development / iteration.

The current model for common parameters is to duplicate / surface (a limited set) of them at the bash param parsing layer. A simple implementation would be to add a single command line parameter to a .yml file that's passed to the ansible-playbook command.

The most common parameter is likely the volume storage path, as our users (primarily developers) oftentimes have specific storage layouts. The default path (in addition) is /opt/vm_images, which is on the smallest partition in a typical disk partition layout if defaults are taken in anaconda.

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/546932
Committed: https://git.openstack.org/cgit/openstack/tripleo-quickstart-extras/commit/?id=341515f25df1b26cc8a3526cddbd907c36aad6aa
Submitter: Zuul
Branch: master

commit 341515f25df1b26cc8a3526cddbd907c36aad6aa
Author: Jose Luis Franco Arza <email address hidden>
Date: Thu Feb 22 11:06:16 2018 +0100

    Include extra_params option in reproducer-quickstart.sh.

    This patch adds the option of overriding the
    parameters used for provisioning [0] the
    multinode stack. The newly added option
    --extra-params/-e allows you to pass different
    values for the instances flavor or networking
    parameters.

    By adding this option we provide flexibility at
    the time of running the reproducer script in
    other cloud environments.

    [0] https://github.com/openstack/tripleo-quickstart-extras/blob/master/roles/multinodes/templates/stack.yaml

    Closes-Bug: #1769532
    Change-Id: I998ffa98da5e2df783908bf003816a06dff30bbb

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/tripleo-quickstart-extras 2.1.1 release.